17
Conduced
RF
IEC61000-
4-6
3 Vrms 150
kHz to
80 MHz
outside ISM
bands
3 Vrms 150 kHz
to
80 MHz
Outside ISM
bands
Portable and mobile RF communications
equipment should be used no closer to any
part of the system, including cables, than
the recommended separation distance
calculated from the equation appropriate
for the frequency of the
transmitter. Recommended separation
distances:
Radiated
RF
IEC61000-
4-3
3 V/m 80
MHz to
2.5 GHz
3 V/m 80 MHz
to
2.5 GHz
Recommended separation distances: 80
Where,
P
is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter
manufacturer and
d
is the recommended
separation distance in meters (m).
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
survey
a
, should be less than the
compliance level in each frequency range
b
.
Interference may occur in the vicinity of
equipment marked with the following
symbol:
Note 1: At 80 MHz to 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV
broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered.
If the measured field strength in the location in which the device is used exceeds the applicable
RF compliance level above, the device should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting
or relocating the device.
b
Over frequency range 150kHz to 80MHz. For Resp field strength should be less than 1V/m.
